Canada

Cornwall

Cornwall is a city in Ontario, Canada, located near Lake Ontario and within reach of freshwater diving options. The closest diving activity tends to be limited and regional; the city itself is more of a gateway for divers heading to nearby lakes and rivers or to marine sites along the Gulf of Saint Lawrence and North Atlantic coast. Local diving infrastructure is modest, with most dives occurring through nearby centers or trips organized from larger centers in southern Ontario. If you’re visiting Cornwall, plan for day trips to freshwater quarries or lakes in the region and check with local clubs for pool sessions and skill refresher courses seasonally.

Essential information for traveling in Canada

About Canada

Sea
Gulf of Saint Lawrence, Bay of Fundy, Labrador ...
Timezone
America/Toronto
Languages
EN FR
Demonym
Canadian
Phone prefix
+1

Practicalities

Currency
CAD
Plug type
Type A, Type B
Airports
YYZ YVR YEG YYC YUL

Diving specifics

Temperature
°C
Depth units
meters
Pressure
bar
Regulators
DIN Yoke (INT)

Dive sites and dive centers around Cornwall

Nearby Dive Sites (2)

Nearby cities for scuba diving around Cornwall

The best time to dive in Cornwall

The best months to dive in Cornwall are from June to September. Temperatures are confortable (17-23°C), currents are mild and the visibility is at its best.

Excellent Good Fair Mitigated
01 - Jan.
-8 °C 6/10
02 - Feb.
-9 °C 6/10
03 - Mar.
-1 °C 6/10
04 - Apr.
7 °C 6/10
05 - May
13 °C 6/10
06 - Jun.
20 °C 7/10
07 - Jul.
23 °C 6/10
08 - Aug.
21 °C 7/10
09 - Sept.
17 °C 8/10
10 - Oct.
11 °C 7/10
11 - Nov.
1 °C 6/10
12 - Dec.
-7 °C 6/10

Based on last year's weather. Scores compare months for this destination only and are indicative. A mitigated month may still suit many divers.

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